212303165 has 4 divisors (see below), whose sum is σ = 254763804. Its totient is φ = 169842528.

The previous prime is 212303149. The next prime is 212303167. The reversal of 212303165 is 561303212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22221796 + 190081369 = 4714^2 + 13787^2 .

It is a cyclic number.

It is not a de Polignac number, because 212303165 - 2⁴ = 212303149 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212303165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212303167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21230312 + ... + 21230321.

It is an arithmetic number, because the mean of its divisors is an integer number (63690951).

Almost surely, 2^212303165 is an apocalyptic number.

It is an amenable number.

212303165 is a deficient number, since it is larger than the sum of its proper divisors (42460639).

212303165 is an equidigital number, since it uses as much as digits as its factorization.

212303165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42460638.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 212303165 is about 14570.6267881653. The cubic root of 212303165 is about 596.5572886419.

Adding to 212303165 its reverse (561303212), we get a palindrome (773606377).

The spelling of 212303165 in words is "two hundred twelve million, three hundred three thousand, one hundred sixty-five".